Peter dillon



(No Model.)

P. DILLON.

VOALENDERING MACHINE.

No. 600,519. Patented Mar. 15,1898.

Nrrno STATES PATENT FFICE.

PETER DILLON, OF LAWRENCE, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO HENRY 0. KING, OF SAME PLACE.

CALENDERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 600,519, dated March 15, 1898.

Application filed December 31, 1896. Serial No. 617,569. (No model.)

To aZZ whom it may concern.-

Be it known that I, PETER DILLON, of Lawrence, county of Essex, State of Massachusetts,have invented an Improvement in Calendering-Machines, of which the following description, in connection with the accompanyin g drawings, is a specification, like letters on the drawings representing like parts.

My invention relates to improvements in calendering-machines, particularly with reference to the doctors which are provided adj acent the calendering-rolls to prevent the paper adhering to the rolls and to cause it to properly pass on from roll to roll.

The present invention is an improvement on the device disclosed in my application, Serial No. 5&7/768, filed May 1, 1895.

In my said former application I have disclosed and claimed, as I believe for the first time, a doctor capable of adjusting itself to meet the alinement of the calender-roll opposite to it, and have based the disclosure and claim on one specific means for permitting this desired alinement, said means having various other advantages fully set forth in the description thereof. My present invention has for its object to produce another and different means for accomplishing the same object, each mechanism, while possessing the common advantage or capability of changing its alinement to meet the alinement of the roll, also possessing other individual advantages and capabilities due to their respective constructions.

Various details of improvement and advantages thereof will be pointed out in the course of the subjoined description of my present invention, which, taken in connection with the accompanying drawings, fully sets forth my invention.

In the drawings, Figure 1 is a central vertical section of a calendering-machine embodying my improvements and showing the doctor-operating mechanisms in elevation; and Fig. 2 is a broken detail, in front elevation, showing one form of mounting the doc tor and its connections.

The frame A and calendering-rolls B, arranged in series one above the other, may be and are of any desired kind common in calendering-machines.

In the present embodiment of my invention the supports 0, carrying the doctors D, are mounted for adjustment in ways E, provided therefor inthe uprights of the frame A.

The doctor D is suitably mounted to move back and forth relatively to its support O, preferably by means of a link (Z, pivotally connected at cl to the doctor or doctor-carrier and at (l to the support C, other connections be ing shown in Fig. 2 and for the lowermost doctor, Fig. 1, consisting of a fixed slideway d on the support, preferably provided with friction rolls or balls (1 to support the slide or projecting end (1 of the doctor.

At its rear side the doctor is provided at each end with a bolt or projection e, adjustable, if desired, said bolt having a stop 6' and nut c thereon and receiving at its outer free end the lower sleeved end 6 of a lever e. The latter is pivoted at its upper end, preferably adj ustably by means of a slot 0, on the support 0, and has an operating-handle e shown as constituting therewith a bell-crank lever.

A spring 3 is interposed between the stop 6- and sleeve 6 tending to separate the two. This spring is caused to normally hold the doctor pressed against its roll by means of a suitable lock, herein shown as a pivoted latch f, weighted at its projecting outer end and having a hook f at its opposite end to engage a pin 0 on the support 0.

As shown in connection with the upper doctors, the various parts are so hung and proportioned that the doctors are held con siderably ahead of the pivots d when the latch f is engaged with pin 0, so that the lift in g of the outer ends of the latches f causes the doctors automatically to swing away from the rolls by force of gravity. As shown, however, in connection with the lower two doctors, there is no tendency of the doctors to swing away from the rolls when the latch is released, but rather a tendency, because of the weight of the latch and handle, to swing or move toward the rolls.

Another important feature of improvement resides in forming the doctor as aremovable and preferably rolled-steel blade having a shank or flange d, removably set into a holding-groove 61 formed in a carrier 01 When one of these blades is injured, it is but a mosleeve 6 to hold the doctor D against its roll with the desired tension when the latch f is hooked under the pin 0. The doctor is then swung or slid forward and the latch f is caught onto its pin 0, thereby maintaining the doctor against its roll under slightlyyielding pressure. If now the paper should catch or a blade scratch or break or other mishap require it, the Weighted end of latch f is thrown up and the handle 6 raised, both these movements being accomplished quickly and almost simultaneously by one upward throw of the hand by reason of the shape and relative positions of the latch f and leverhandle 6 and the doctor is thereby moved entirely away from its roll and in case of the upper doctors will maintain itself automatically by reason of its gravity slightly removed from the roll. The blade is then removed from its groove 61 and another blade inserted, or the mishap, whatever it may be, is remedied, the doctor is pushed forward, the latch is caught onto its pin, and the machine continues operating, having had only a momentary delay.

It will be observed that unless the latch is caught on its pin the spring 8 has no tendency to hold the doctor against its roll.

If the doctor does not meet its roll at the .proper angle, one or both ends thereof may be raised or lowered by correspondingly adj usting the lever or levers in their slots 0.

The construction described also enables the doctors to automatically aline themselves with their rolls, the respective ends of the rolls being independently movable to a limited extent, and this, taken in connection with the other adjustments and capabilities above set forth, permits any and all axial adjustment-s required.

Having fully described myinvention, what I claim, and desire to secure by Letters Patent, is

1. A doctor, and supports therefor, combined with means to movably support said doctor at each end and mechanism to cause the same to move bodily back from the roll, a tension device carried by said doctor and normally inoperative, and means to render said tension device operative, substantially as described.

2. The combination with a roll, of a doctor,

and mechanism including a latch rendering said tension device operative to hold said doctor against the roll, substantially as described.

3. A doctor, and its supports, movable connections between said doctor and its supports, a projection extending from the doctor, a lever pivotally connected to said projection and to the adjacent support, and a handle to operate the lever, combined substantially as described.

4. A doctor, and its supports, movable connections between said doctor and its supports, a projection extending from the doctor, a lever movable longitudinally on said projection and pivotally connected to said projection and to the adjacent support and a handle to operate the lever, combined substantially as described.

5. A doctor, and its supports, movable connections between said'doctor and its supports, a projection extending from the doctor, a lever pivotally connected to said projection and to the adjacent support, a lock to hold said lever normally in a certain position, and a handle to operate the lever, combined substantially as described.

6. A doctor, and its supports, movable connections between said doctor and its supports, a projection extending from the doctor, a tension device, a lever movable longitudinally on said projection and pivotally connected to said projection and to the adjacent support,

and a handle to operate the lever, combined substantially as described.

7. The combination with a doctor, its supports, and movable connections between the doctor and its supports, of a projection extending from said doctor, a stop thereon, a lever movable longitudinally on and pivotally connected to said projection and connected to the adjacent support, a spring operating between said stop and lever to hold them apart, and a lock to hold said lever under pressure against said spring, substantially as described.

8. The combination with a'doctor, its suports, and movable connections between the doctor and its supports, of a projection extending from said doctor, a stop adjustable thereon, a lever movable longitudinally on and pivotally connected to said projection and connected to the adjacent support, a spring operating betweensaid stop and lever to hold them apart, and a lock to hold said lever under pressure against said spring, substantially as described.

9. The combination with a doctor, its supports, and movable connections between the doctor and its supports, of a projection extending from said doctor, a stop thereon, a lever movable longitudinally on and pivotally connected to said projection and connected to the adjacent support, a spring operating between said stop and lever to hold them apart, a pin on said support, and a latch pivoted on said lever, said latch being weighted at its outer end and adapted to engage said pin at its other end, substantially as described.

10. A doctor, supports therefor, and mov- V able connections between the doctor and its 5 supports, combined withalever pivotally connected to the doctor and to the adjacent support, and means to adjust said lever up and down on its said support, substantially as described. 0 11. A doctor, supports therefor, and links pivotally connected to the doctor and to said supports, combined with a projection from said doctor, a lever longitudinally movable on said projection and pivotally connected thereto and to the adjacent support, and a 15 handle to operate the lever, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' PETER DILLON.

Witnesses:

GEO. I-I. MAXWELL, EMMA J. BENNETT. 

